kernel: kvm: guest userspace to guest kernel write

A flaw was found in the way Linux kernel KVM hypervisor emulated instructions such as sgdt/sidt/fxsave/fxrstor. It did not check current privilegeCPL level while emulating unprivileged instructions. An unprivileged guest user/process could use this flaw to potentially escalate privileges inside...

CVE-2018-10853

A flaw was found in the way Linux kernel KVM hypervisor before 4.18 emulated instructions such as sgdt/sidt/fxsave/fxrstor. It did not check current privilegeCPL level while emulating unprivileged instructions. An unprivileged guest user/process could use this flaw to potentially escalate...

kernel: xen: svm: insufficiencies in handling emulated instructions during vm exits

The instruction emulation in Xen 3.0.3 allows local SMP guest users to cause a denial of service host crash by replacing the instruction that causes the VM to exit in one thread with a different instruction in a different thread...